AI 中文总结
本文提出超导拓扑晶态金属ZrRuAs作为平台，通过其镜对称保护表面态与超导性结合，在FMI异质结构中实现多重马约拉纳零模，为拓扑量子计算提供新方案。
AI 中文摘要
对称保护的多重马约拉纳零模（MZMs）可以在外场下被操控，并已成为实现拓扑量子计算的一条有前景的途径。尽管承载多重MZMs的合适材料仍然稀缺，我们提出了一种可行的候选平台，称为超导拓扑晶态金属（STCMs），它同时具备对称保护的拓扑能带和本征超导性。模型分析表明，s波超导性、镜面对称保护的多重表面狄拉克锥以及引入的自旋劈裂之间的相互作用导致了高BdG陈数$\mathcal{N} = \pm C_M$，其中$C_M$是STCM的镜陈数。第一性原理计算确定了实验合成的超导体ZrRuAs是一个有前景的候选材料，其$C_M=2$，承载两个对称保护的表面狄拉克锥。当与铁磁绝缘体（FMI）如GdI$_2$集成到异质结构中时，可以实现$\mathcal{N} = -2$的拓扑超导相，从而产生两支MZMs。这一新方案具有结构简单和可调性的优势，使FMI/STCM异质结构成为研究多极MZMs和新颖拓扑量子比特的理想平台。
英文摘要
The symmetry-protected multiple Majorana zero modes (MZMs) can be manipulated under external fields and have emerged as a promising pathway toward realizing topological quantum computing. While the suitable materials hosting multiple MZMs are still scarce, we propose a feasible candidate platform named superconducting topological crystalline metals (STCMs) that simultaneously possess symmetry-protected topological bands and intrinsic superconductivity. Model analyses demonstrate that the interplay among s-wave superconductivity, mirror symmetry-protected multiple surface Dirac cones, and the introduced spin splitting leads to high BdG Chern numbers of $\mathcal{N} = \pm C_M$, where $C_M$ is mirror Chern number of the STCM. First-principles calculations identify the experimentally synthesized superconductor ZrRuAs as a promising candidate with $C_M=2$, hosting two symmetry-protected surface Dirac cones. When integrated into a heterostructure with the ferromagnetic insulator (FMI) such as GdI$_{2}$, a topological superconducting phase with $\mathcal{N} = -2$ can be realized, giving rise to two branches of MZMs. This new scheme offers advantages of structural simplicity and tunability, making the FMI/STCM heterostructure an ideal platform for investigating multipole MZMs and novel topological qubit.
Comments6 pages, 4 figures
DOI：10.1038/s41524-026-02292-7
